From f20247ca320ffad546dff0bea937bf7a8ccc3d25 Mon Sep 17 00:00:00 2001
From: sige <sige@sige.com>
Date: Tue, 26 Mar 2024 20:35:40 +0800
Subject: [PATCH] ~

---
 .../my/graphiteDigesterBg/resource/ResHeatingTubeRackSlotManager.java  | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/src/main/java/com/my/graphiteDigesterBg/resource/ResHeatingTubeRackSlotManager.java b/src/src/main/java/com/my/graphiteDigesterBg/resource/ResHeatingTubeRackSlotManager.java
index 0c659f5..7f1b68e 100644
--- a/src/src/main/java/com/my/graphiteDigesterBg/resource/ResHeatingTubeRackSlotManager.java
+++ b/src/src/main/java/com/my/graphiteDigesterBg/resource/ResHeatingTubeRackSlotManager.java
@@ -46,6 +46,9 @@ public class ResHeatingTubeRackSlotManager extends DiResourceManagerBase {
 
     // stop temperature refresh
     public void stopTemperatureRefresh() {
+        if ( null == this.temperatureRefreshTimer ) {
+            return ;
+        }
         this.temperatureRefreshTimer.cancel();
     }